Effect of Network Parameters on the Injection Current Requirement of D-STATCOM Designed to Mitigate Voltage Sag

Abdollah Shokri,Hussain Shareef,Azah Mohamed,Masoud Farhoodnea,Hadi Zayandehroodi

doi:10.19026/rjaset.5.5098

Abdollah Shokri, Hussain Shareef + Show 3 more

Open Access

https://doi.org/10.19026/rjaset.5.5098

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Abstract

The Distribution Static Compensator (D-STATCOM) can be used as a parallel voltage sag mitigation device at distribution systems. The D-STATCOM is also able to regulate and balance the bus voltage by absorbing or generating the required reactive power at specific buses. This study presents an overview on D-STATCOM structure and its simplified model that can be used for voltage sag analysis. In addition, this study also investigates the effect of various load and network parameters on the nominal power requirement D-STATCOM and its ability to compensate voltage sag. The results illustrate the performance of D-STATCOM by using an injection current to various conditions for voltage sag mitigation. In addition, the result shows that the D-STATCOM is not economical and effective in high voltage networks with low inductance feeder.

Highlights

Due to the recent increase in the number of sensitive devices and controllers such as microcontrollers, computers and motor drives, most of the industrial customers prefer to receive an improved level of electrical energy with high quality
The D-STATCOM and Dynamic Voltage Restorer (DVR) are most effective Voltage Source Converter (VSC) based devices among other types of Custom Power Devices (CPD) which are used for power quality improvement (Da Costa Teixeira, 2004; Nielsen and Blaabjerg, 2007)
The main difference between the D-STATCOM and DVR is that the DVR injects voltage in series with the system, while the D-STATCOM injects current in parallel to the system to compensate the voltage sag, swell and interruption (Ramsay et al, 1996; Wei-Neng and Kuan-Dih, 2003)

Summary

INTRODUCTION

Due to the recent increase in the number of sensitive devices and controllers such as microcontrollers, computers and motor drives, most of the industrial customers prefer to receive an improved level of electrical energy with high quality. The D-STATCOM and DVR are most effective Voltage Source Converter (VSC) based devices among other types of CPDs which are used for power quality improvement (Da Costa Teixeira, 2004; Nielsen and Blaabjerg, 2007). Nazarloo proposed a new control method to compensate voltage sags caused by all types of fault using PI controller for 12-pulse inverter based DSTATCOM. In this method, the voltage error signal is obtained by comparing the measured voltage with a reference voltage at PI controller unit.

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Findings

CONCLUSION